US 11,053,387 B2
One-step spun composite DTY and preparation method thereof
Hongwei Fan, Wujiang (CN); Guanfan Jin, Wujiang (CN); Ming Chen, Wujiang (CN); Huailin Ren, Wujiang (CN); Yongfeng Wang, Wujiang (CN); and Xiangming Wang, Wujiang (CN)
Assigned to JIANGSU HENGLI CHEMICAL FIBRE CO., LTD., Wujiang (CN)
Appl. No. 16/641,255
Filed by JIANGSU HENGLI CHEMICAL FIBRE CO., LTD., Wujiang (CN)
PCT Filed Jul. 27, 2018, PCT No. PCT/CN2018/097501
§ 371(c)(1), (2) Date Feb. 24, 2020,
PCT Pub. No. WO2019/114277, PCT Pub. Date Jun. 20, 2019.
Claims priority of application No. 201711340288.7 (CN), filed on Dec. 14, 2017.
Prior Publication US 2020/0190319 A1, Jun. 18, 2020
Int. Cl. C08L 67/06 (2006.01); C08L 67/02 (2006.01); D01F 6/84 (2006.01)
CPC C08L 67/06 (2013.01) [C08L 67/02 (2013.01); D01F 6/84 (2013.01); C08L 2203/12 (2013.01); C08L 2205/025 (2013.01)] 20 Claims
 
1. A one-step spun composite draw texturing yarn (DTY), wherein a monofilament of the one-step spun composite DTY comprises a first modified polyester with a first viscosity and a second modified polyester with a second viscosity;
wherein the first modified polyester or the second modified polyester has a molecular chain structure comprising terephthalic acid segments, ethylene glycol segments and branched diol segments, and a branched diol of the branched diol segments has a structural formula of

OG Complex Work Unit Chemistry
wherein each of R1 and R2 is selected from a linear alkylene with 1-3 carbon atoms, R3 is selected from an alkyl with 1-5 carbon atoms, and R4 is selected from an alkyl with 2-5 carbon atoms;
wherein the one-step spun composite DTY has an elastic shrinkage rate of greater than or equal to 35%.